Might as well sleep on the floor

I thought I was buying a high quality mattress. The cost sure indicated that I was. The store where I bought it assured me that this was the softest, most comfortable mattress they sold. The store model seemed soft, but the mattress I received felt like I was sleeping on the floor. I have not had a good night since I bought it 5 1/2 months ago. I have since layered 4 mattress toppers trying to make it softer, to no avail. This is the hardest, most uncomfortable mattress I have ever owned and the most expensive. I called the manufacturer and they suggested that I walk on the bed to soften it up. They would not exchange the mattress or help me in any way, and it was too expensive to throw away. I will never buy from Chattam and Wells again, and will not recommend it to anyone ever. Very disappointing to see that some manufacturers do not stand behind their products. I would have been satisfied to exchange the mattress, but they would do nothing.